<template>
  <div :id="echartId" :style="chartStyle" />
</template>

<script setup>
import * as echarts from 'echarts'
import { ref, onBeforeUnmount, onMounted, defineProps } from 'vue'

const props = defineProps({
  chartStyle: {
    type: Object,
    default: () => ({
      width: '100%',
      height: '100%'
    })
  },
  chartOption: {
    type: Object,
    default: () => ({}),
    required: true
  }
})

const echartId = ref(`echarts-id-${parseInt(Math.random() * 1000000)}`)

const drawChart = () => {
  const echart = echarts.init(document.getElementById(echartId.value))
  echart.setOption(props.chartOption, { notMerge: true })
  // 监听窗口大小变化，重新渲染图表
  window.addEventListener('resize', () => {
    echart.resize()
  })
}

// 在组件挂载后初始化ECharts图表
onMounted(() => {
  drawChart()
})

// 在组件销毁前清理ECharts实例和移除事件监听
onBeforeUnmount(() => {
  const echart = echarts.getInstanceByDom(document.getElementById(echartId.value))
  if (echart) {
    echart.dispose()
  }
  window.removeEventListener('resize', () => {
    const echart = echarts.getInstanceByDom(document.getElementById(echartId.value))
    if (echart) {
      echart.resize()
    }
  })
})
</script>